Magazine pencil



July 18, 1933. w. KOBLER Er AL MAGAZINE PENCIL `Filed oct. 12, 1952 jwew/@s MMM Mq, 2% MQ@ lio `Patented July 18, 1933 UNITED STATES WERNER xoBLna AND' vIcroR xoisLnn," or"l ZUR-Ien, SWITZERLAND MAGAZINE PENCIL I Application filed October 12, 1932, Serial No.\37, 534, andlnGermany October 21, 19.31'.

This invention relates to magazine pencils comprising a magazine for marking elements and-a propeller pin for the elements which is adapted to be so far retracted by means of an extensible part that in the magazine a fresh marking element is adapted to move in front of the propeller pin and to be removed `from the magazine andinserted inthe guide bore for the marking elements by this pin, when theV extensible part is restored. lt is known to arrange in a sleeve-shaped extensible part a screw which is adapted to be turned by means of a cap in order to be able to positively displace the propeller pin coupled with the screw relatively to the exten-sible part 'forwardly or backwardly as required. It is also known to arrange the extensible part in a stationary sleeve provided with a screw bore and to screw threadedly engage the propeller pin with this screw bore, so as to permit of displacing the pin, by turning it by means of the extensible part, longitudinally of the stationary interiorly threaded sleeve.

In withdrawing the extensible part with this arrangement the drawback ensues that the coupling head of the propeller pin drags along the screw thread in the stationary sleeve. All the aforementioned constructions are complicated and for replenishinf the lead supply or inspecting the amount of leads contained in the magazine or for remov- Ing disturbances in the feed of a lead it is required to screw t-he pencil apart which is inconvenient. lith another known construction for magazine pencils engagement between the propeller pin and a sleeve-shaped extensible part which when withdrawn liberates the magazine is provided by friction action only. This arrangement is not capable of ensuring that the propeller pin is moved together with the extensible part in altogether dependable manner and, moreover', there is no possibility of turning the propeller pin, so that for advancing a lead it is every time required, by pressure exertion on the front end of the lead, to force the propeller pin backwards against spring action, whereafter the propeller pin and accordingly also the lead is somewhat advanced, when -the spring is released again. By these means the feed of the lead is only small and the point of the lead is impaired and often broken. f

According to the' invention these disadvantages of the described'known magazine pen- PArENr oF1=1cEj f A' cils are eliminatedin a. simple mannerby r constructing the extensible part as a rotatable interiorly threaded feed sleeve for the `propeller pin and vproviding this sleeve vwith ian extension adapted for closing-the magazineand opening the magazine, when the ysleeve' is withdrawn.

` With this arrangement, due to the positive actuation of the propeller pin, the feed; ,of a

Vwhen a fresh leadis advanced inspecting the supply of leads in theV magazineis rendered possible without any further provisions as well as rearranging the leads in thev magazine if necessary, and eventual disturbances in the feed of a leadare readily removable. Furthermore it is possible tofstorev a large supply of leads in the pencil. v i n In the .drawing a constructional form o the invention is illustrated by way of example only, in which e Fig l shows a longitudinal section of pencil according'to-the invention;

Fig. 2 is a section similar to Fig. .l except that the propeller pin for a lead Vis shown in advanced position;

Figs. 3 and 4 show longitudinal sections for explaining the incidences'during the removal of a fresh marking element or lead `from the magazine and insertion of the same in the guide bore therefor;

Figs. to Srepresent cross-sections on the lines `V-V, VI-VL VII-VII and VIII-VIII respectively in Fig. l on a larger scale. f

Referring to the drawing, the magazine pencil is providedwith an interior longitudinal member l, which in its cylindrical forward part is constructedas a magazine 2 for storing marking elements or leads 3.

This magazine 2, when viewed in cross-seci tion, is provided with an arcuately bottomed groove 4 with two converging-side walls 5. Inthe front and the back the magazine` 2'is limited by end walls. Forwardly in the longitudinal member l the head piece 6 of the magazine pencil is screwed. This forwardly conically reduced head piece 6 is Vprovided with a through bore 7 coaxially. disposed with the groove 4. The longitudinal member l` includes in its rear part a U-shaped guide 8 (Fig. 6) which at. times accommo- Vics l are spaced apart the distance of the two legs of the guide 8, wherebythis guide is continued and adapted for also yreceivingy the head 10 arranged on the propeller pin 9 (Figs. 5, 4 and 1) on this extended part. In

the web of the slide 11 a leaf` spring 12 is arranged which is fastened with one-of its ends to the 'slide for which purpose the leaf spring 12 is passed with the respective end 13, which is bent up at right angles, through the web of the slide 11. The leaf spring 12 serves for maintaining with its free end the head 10, arranged on the propeller pin 9 and provided with helical gear teeth, in engagement with an interiorly threaded sleeve k14,

as shown in Figs. 1, 4 and 5. The sleeve 14 is formed forwardly of its threaded portion with an enlarged bore 15 devoid of screw threads and borderedbyan annular rib 16. The' interiorly threaded sleeve 14 is rotatably mounted in a surrounding tube 17 which normally conlines the magazine of the magazine pencil on the'outside (Figs. 1 and 7). At the rear ends of the sleeve 14 and the tube 17 a lock-nutr 18 is provided. At this end of the inner sleeve 14 an interiorly threaded ring 19 is positioned into which 'aplug 2O is screwed which serves for receiving a rubber 21' which is covered by a detachable ferrule 22 of sheet metal enclosingv the plug 20.

The operation and manner of handling of the magazine pencil according to the invention is the following: The marking elementl or lead 3, shown in Fig. 1, to be inserted in the through-bore 7 of the front head piece 6 is advanced to the requisite extent by means 'of the propeller pin 9 by turning the interiorly "threaded sleeve 14, whereby the pin enters the bore 7 a corresponding distance, whereas the head piece 6 and consequently also the longitudinal member 1 are held in position. Incidental thereto thcinteriorly threaded sleeve- 14 pushes the head 10 of the Apropeller pin 9 out of t-he Slidell into the vguide 8 and propels it longitudinally therein. The head 10 of the propeller pin 9 is prevented from turning in the parts 11 and S by engagement of these parts and for the length of the guide 8 the web of the latter ensures that the head 10 is maintained in engagement with the screw thread of the sleeve 14, so that therefore the propeller pin 9 is advanced along the groove 4 of the lead magazine 2.

On ej ecting the remainder of the spent lead out of the bore7 by the propeller pin 9 the hea-d 10 of the propeller pin 9 enters the enlarged bore 15 forwardly of the interiorly threaded sleeve 14, as shown in Fig. 2. For introducing a fresh lead in the bore 7 the exterior tube 17 is withdrawn to assume the position shown in Fig. 3so that the propeller'pin9 is retracted from the bore 7. Together with they exterior tube 17 the interiorly threaded sleeve 14 is displaced.

which, by means of its front rib 1G, moves the head 10 andthus thepropeller pin 9 and also the leaf spring 12, by engagementI of its end'l, as well as the slide 1l in unison therewith. Alhepropeller pin 9, whichis preferably' made' of springy wire, then assumes its initial shape, as shown 1n Fig. 3, wherein 1t `bears against a guide bore 23 provided in -this head into engagement with the thread of the sleeve 14 by the'slide 11 bearing on the plug 20, whereby the slide and the spring 12 are caused to move together with the exterior tube 17 also on this part of its travel. Thereafter the exterior tube 17 is withdrawn for a second time so as to position the parts of the pencil as'shown in Fig. 4. During this second withdrawal of the ex terior sleeve 17, in consequence of the head 10 being in mesh with the interiorly threaded sleeve 14. the propeller pin 9 is actuated to be retracted from the lead magazine 2. Subsequently, when the magazine pencil is bodily moved to occupy an approximately horizontal position in such manner that the groove 4 of the lead magazine 'forms the bottom of the magazine` a lead 3 of thesu'pply is adapt'- ed to gravitatively move down to the lowest position, i. e. into the groove 4. Eventually it may be required to slightly shake the pencil for facilitating this movement of the lead. Thereupon the outer tube 17 is again closed on thehead piece 6 at the front end of the longitudinal member l for pushing the lead 3 guided in the groove 4 of the lead magazine 2 from the latter into the bore 7 of the head piece 6 by means of the propeller pin 9. lVhen in this position of the parts df the magazine pencil, which is shown in Fig. 1, the interiorly ,threaded sleeve 14 is turned, the lead 3 that hasbeen selected for use adapted to be moved to project out of the front head piece of the'magazine pencil at will. v

. In the Figs. 1 to 3 for the salie of clearness no marking elements are shown to be inserted in the magazine/2. Vhen the last marking element in the'magazine 2 is used up, the supply is replenished. For this purpose the outer tube 17 is withdrawn, and thus the magazine 2 opened, with the parts in their positions shown in Fig. 4.

The withdrawal of the exterior tube 17 is only possible, after a mark provided on this tube is moved opposite a corresponding mark on the front head piece 6 of the magazine pencil. This position of the parts of the pencil is obtained bycorrespondingly turning the exterior tube 17, whereby a stop 24 (Figs. 1 and S) on this tube is removed from a circumferential and thus transversely directed groove 25 of the longitudinal member 1 to stand opposite a longitudinal groove 26 of the member 1, so that by guiding engagement of the stop 24 in the longitudinal -groove 26 longitudinal displacement of the exterior tube 17 relatively to the member 1 is possible until the stop 24 on the exterior tube 17 hits the rearward limiting` portion of the longitudinal groove 26 in the longitudinal member 1, as shown in the Figs. 3 and Ll. After the stop 24, by correspondingly adjusting the exterior tube 17 is moved in engagement with the transverse groove 25 of the longitudinal member 1 the exterior tube 17 is locked against longitudinal displacement.

`We do not limit ourselves tothe particular size, shape, number or arrangement of the partsv as shown and described, all of which may be varied without going beyond the scope of our invention as shown, described and claimed. y

That we claim is 1. In a magazine pencil in combination a into the element guide bore of the pencil, the

outer wall of said magazine being adapted to enclose the marking elements.

2. In a magazine pencil in combination a marking elementlmagazine, a propeller pin forthe marking elements, a head provided on said propeller pin, a withdrawable rotatable interiorly threaded feed sleeve for said propeller pin cooperatingwith said head'of said pin, and having a forward enlarged threadless bore portion adapted to receive said head on said propeller pin in the foremost extended position of said pin, an abutment member provided on said interiorly threaded feed sleeve and adapted to move said propeller pin together with said withdrawable sleeve during withdrawal of the latter by engagement with said head on said pin, and a spring coupled to said withdrawable sleeve for simultaneous longitudinal displacement and adapted to couple said head of said propeller drawal of said feed sleeve for evacuating the f element guide bore of the pencil for insertion of a fresh markingv element'.

3. In a magazine pencil in combination a marking element magazine, a springy propeller pin for the marking elements, a head provided on said propeller pin, a withdrawable rotatable sleeve for said propeller pin cooperating with saidV head of said pin, andhaving a forward enlarged threadless bore portion for said head on said propeller pin to be positioned in and removed by kthe spring ofthe propeller pin in the foremost position of said pin, an abutment member provided on said interiorly threaded feed sleeve and adapted to move said propeller' pin together with said withdrawable sleeve during withdrawal of the latter by engagement with said head on said pin, and a spring coupled to said withdrawable sleeve for simultaneous longitudinal displacement and adapted to couple said head of said propeller pin to said feed sleeve upon the complete resto-ration of said sleeve after the first withdrawal for withdrawingv said pin during the subsequent second withdrawal of said feed sleeve for evacuating the element guide bore of the pencil for insertion of a fresh marking'element.

4:. In a magazine pencil in combination a marking element magazine, a propeller pin for the marking elements, a head provided on said propeller pin, a withdrawable rotatable interiorlythreaded `feed sleeve for said propeller pin cooperating with said head of said pin, an abutment member provided on said interiorly threaded feed sleeve and adapted to move said propeller pin together with said withdrawable sleeve during withdrawal of the 'latter by engagement with said head on said pin, a longitudinal guideway provided in the body of the pencil and adapted to accommodate" said head on said propeller pin in advanced `positions of the latter, a slide' guided by said longitudinal interiorly threaded feedV guideway and coupled to said withdrawable sleeve for simultaneous longitudinal displacement and adapted to receive said head at the end of the restoring movement of said extensible sleeve' following the rst withdrawal of the same for subsequently reinserting said head of said propeller pin in said longitudinal guideway.

WERNER KOBLER. VICTOR KOBLER. 

